A manually operated double link shut off valve

Abstract

This utility model relates to the field of airtight valve technology, and in particular to a manual double-link airtight valve, comprising a valve body, a feed pipe, an air blowing hood, an air guide pipe, a rotating shaft, and a transmission mechanism. A drain pipe is installed on the valve body, and a sub-control valve is installed on the drain pipe. The feed pipe is located within the valve body and has a through hole B communicating with the drain pipe. A central column is installed inside the feed pipe, and a filter screen is rotatably mounted on the central column. An L-shaped scraper is installed on the inner wall of the feed pipe, which slides in contact with the filter screen. The air blowing hood is located inside the feed pipe. The air guide pipe is located on the central column, and its output end communicates with the air blowing hood. An air compressor assembly is installed inside the air guide pipe. The rotating shaft is rotatably connected to the central column and has an impeller mounted on it. The transmission mechanism drives the rotating shaft, the filter screen, and the air compressor assembly. This utility model can intercept dust and automatically backflush and clean the filter screen after the airtight valve is opened, ensuring efficient operation of the airtight valve without disassembly and without consuming electricity.

Description

Technical Field

[0001] This utility model relates to the field of sealing valve technology, and in particular to a manual double-link sealing valve. Background Technology

[0002] The manual double-link shut-off valve is a specially designed valve mainly used in the field of civil defense equipment technology, especially in situations where strict control of airflow direction is required, such as ventilation and exhaust pipelines in civil defense projects, national defense facilities, and civil industrial projects.

[0003] Chinese patent CN219796120U discloses a manual double-link sealing valve. The valve is operated by an operator who inflates a filling element through a connector. Since the filling element is an air bladder, its volume increases with the influx of gas. During this process, the filling element contacts a baffle plate. Under the constraint of the baffle plate and a fixing block, the filling element is compressed and then pushed to both sides. This compression seals the contact point between the baffle plate and the valve body, further enhancing the seal between them and preventing leakage after gas enters the valve body.

[0004] However, the device still has shortcomings: because a filter screen is set up to intercept dust and other impurities, when the filter screen is severely clogged, it will directly affect the flow performance of the sealing valve. Furthermore, once the built-in filter screen is severely clogged, it needs to be disassembled and cleaned by staff, which is very troublesome. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a manual double-link sealing valve.

[0006] The technical solution of this utility model is: a manual double-link sealing valve, including a valve body, a valve cover and a drive assembly for driving the valve cover to flip, a drain pipe connected to the inside of the valve body at the input end of the valve body, and a sub-control valve on the drain pipe.

[0007] The feed tube is coaxially installed at the input end of the valve body cavity. The feed tube has a through hole B that communicates with the drain pipe. A central column is coaxially installed on the inner side of the feed tube. A filter screen is coaxially rotatably installed on the central column. The outer edge of the filter screen slides in contact with the inner arc surface of the feed tube. An L-shaped scraper is installed on the inner wall of the feed tube near the through hole B. The L-shaped scraper slides in contact with the side of the filter screen near the input end of the valve body.

[0008] The air blowing hood is installed inside the feed tube, and the air blowing hood and the L-shaped scraper are symmetrical about the filter screen.

[0009] An air guide tube is installed on the central column. The inlet end of the air guide tube is connected to the outlet end of the valve body, and the outlet end of the air guide tube is connected to the inlet end of the air blowing hood. An air compression assembly is installed inside the air guide tube.

[0010] A rotating shaft is rotatably connected to the central column on the same axis, and an impeller is installed on the side of the rotating shaft near the output end of the valve body.

[0011] The transmission mechanism connects the rotating shaft, the filter screen, and the air compressor assembly, so that the rotating shaft drives the filter screen to rotate and drives the air compressor assembly to work.

[0012] Preferably, a through hole A is provided on the valve body, and through hole A is attached to and connected with through hole B, and the input end of the drain pipe is covered by the outside of through hole A.

[0013] Preferably, the control valve includes a cylinder and a crank. The cylinder is disposed inside the drain pipe and rotatably connected to it. A receiving groove is provided on the arc surface of the cylinder. The opening size of the receiving groove is not less than the cross-sectional size of the drain pipe. When the cylinder is rotating, the drain pipe is never connected to the outside. A crank is rotatably disposed on the drain pipe to drive the cylinder to rotate.

[0014] Preferably, a locking knob is provided on the drain pipe and is spirally connected thereto, with one end of the locking knob inserted into the drain pipe abutting against the outer surface of the cylinder.

[0015] Preferably, the air compressor assembly includes a turbine, a conical air chamber is provided inside the air guide pipe, an air inlet is provided at the input end of the air guide pipe, an air outlet is provided at the output end of the air guide pipe, the output end of the air outlet is connected to the interior of the air blowing hood, a drive shaft coaxial with the conical air chamber is provided inside the air guide pipe, the turbine is coaxially connected to the drive shaft, and the turbine is a conical turbine.

[0016] Preferably, the transmission mechanism includes transmission component A and transmission component B. Transmission component A includes a helical gear and a helical gear disk. The helical gear is coaxially connected to the transmission shaft, and the helical gear disk is coaxially connected to the rotating shaft. The helical gear meshes with the helical gear disk.

[0017] Preferably, the transmission component B includes gear A, gear B and internal gear ring. Gear A is coaxially connected to the rotating shaft, gear B is rotatably connected to the central column and meshes with gear A, and the internal gear ring is coaxially rotatably mounted on the central column. Gear A and gear B are both located inside the internal gear ring, and gear B meshes with the internal gear ring.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] By setting up a drain pipe and rotating a cylindrical body with a receiving groove on an arc surface inside the drain pipe, dust and other impurities falling into the receiving groove can be directly discharged through the rotating cylinder. During the discharge process, the air in the sealed valve will not be discharged along the drain pipe outlet. A rotating filter screen is used, and an L-shaped scraper, a rotating shaft, an impeller, and a transmission mechanism are set up. The impeller rotates and drives the filter screen to rotate through the transmission mechanism. When the filter screen rotates, the L-shaped scraper scrapes off the impurities on its surface and makes them fall into the drain pipe. At the same time, this utility model also sets up a cooperative structure of air blowing hood, air guide pipe, and turbine. When the airflow is flowing at high speed, the transmission mechanism drives the turbine to rotate at high speed, so that clean air enters the air guide pipe and is compressed through its conical air chamber and blown through the air blowing hood to clear the filter screen, ensuring that the filter screen maintains efficient conductivity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of the connection structure between the valve body and the valve cover;

[0022] Figure 3 This is a schematic diagram of the internal structure of the sewage pipe;

[0023] Figure 4 This is a schematic diagram of the connection structure of the various components on the feed tube;

[0024] Figure 5 This is a schematic diagram of the connection structure between the rotating shaft, the filter screen, and the turbine.

[0025] Reference numerals: 1. Valve body; 101. Through hole A; 2. Valve cover; 3. Drive assembly; 4. Drain pipe; 5. Cylinder; 501. Material receiving trough; 6. Crank; 7. Locking knob; 8. Guide pipe; 81. Through hole B; 9. Center column; 10. Filter screen; 11. L-shaped scraper; 12. Air blowing hood; 13. Air guide pipe; 131. Conical air chamber; 132. Air inlet; 14. Air outlet pipe; 15. Rotating shaft; 16. Impeller; 17. Gear A; 18. Gear B; 19. Internal gear ring; 20. Drive shaft; 21. Turbine; 22. Helical gear; 23. Helical gear disc. Detailed Implementation

[0026] Example 1

[0027] like Figures 1-5As shown, this utility model proposes a manual double-link sealing valve, including a valve body 1, a feed pipe 8, an air blowing hood 12, an air guide pipe 13, a rotating shaft 15, and a transmission mechanism. A valve cover 2 and a drive assembly 3 for rotating the valve cover 2 are provided on the valve body 1. The drive assembly 3 has the same structure as the drive assembly of commercially available double-link sealing valves and will not be described in detail. A drain pipe 4 communicating with the interior of the valve body 1 is provided at the input end, and a sub-control valve is provided on the drain pipe 4. The sub-control valve includes a cylinder 5 and a crank 6. The cylinder 5 is disposed inside the drain pipe 4 and rotatably connected to it. A receiving groove 501 is provided on the arc surface of the cylinder 5. The opening size of the receiving groove 501 is not less than the cross-sectional size of the drain pipe 4. While the cylinder 5 is rotating, the drain pipe 4 is never connected to the outside. A crank 6 for driving the cylinder 5 to rotate is rotatably mounted on the drain pipe 4. A feed pipe 8 is coaxially disposed at the input end of the inner cavity of the valve body 1. A through hole B81, communicating with the drain pipe 4, is provided on the feed pipe 8. A central column 9 is coaxially disposed on the inner side of the feed pipe 8, and a filter screen 10 is coaxially rotatably disposed on the central column 9. The outer edge of the filter screen 10 slides in contact with the inner arc surface of the feed pipe 8. An L-shaped scraper 11 is disposed on the inner wall of the feed pipe 8 near the through hole B81, and the L-shaped scraper 11 slides in contact with the side of the filter screen 10 near the input end of the valve body 1. A through hole A101 is provided on the valve body 1, which is attached to and communicates with the through hole B81. The input end of the drain pipe 4 is covered by the outside of the through hole A101. An air blowing hood 12 is disposed inside the feed pipe 8, and the air blowing hood 12 and the L-shaped scraper 11 are symmetrical about the filter screen 10. An air guide pipe 13 is mounted on the central column 9. The input end of the air guide pipe 13 is connected to the output end of the valve body 1, and the output end of the air guide pipe 13 is connected to the input end of the air blowing hood 12. An air compressor assembly is installed inside the air guide pipe 13. The air compressor assembly includes a turbine 21. A conical air chamber 131 is provided inside the air guide pipe 13. An air inlet 132 is provided at the input end of the air guide pipe 13. An air outlet pipe 14 is provided at the output end of the air guide pipe 13, and the output end of the air outlet pipe 14 is connected to the interior of the air blowing hood 12. A drive shaft 20 coaxial with the conical air chamber 131 is installed inside the air guide pipe 13. The turbine 21 is coaxially connected to the drive shaft 20 and is a conical turbine. A rotating shaft 15 is rotatably connected to the central column 9. An impeller 16 is provided on the side of the rotating shaft 15 near the output end of the valve body 1. A transmission mechanism drives the rotating shaft 15, the filter screen 10, and the air compressor assembly to rotate the filter screen 10 and drive the air compressor assembly to work when the rotating shaft 15 rotates.The transmission mechanism includes transmission component A and transmission component B. Transmission component A includes a helical gear 22 and a helical gear disk 23. The helical gear 22 is coaxially connected to the transmission shaft 20, and the helical gear disk 23 is coaxially connected to the rotating shaft 15. The helical gear 22 meshes with the helical gear disk 23. Transmission component B includes gear A17, gear B18 and internal gear ring 19. Gear A17 is coaxially connected to the rotating shaft 15. Gear B18 is rotatably connected to the central column 9 and meshes with gear A17. The internal gear ring 19 is coaxially rotatably mounted on the central column 9. Gear A17 and gear B18 are both located inside the internal gear ring 19, and gear B18 meshes with the internal gear ring 19.

[0028] In this embodiment, after the valve cover 2 is opened, the sealed valve is in the open state. Gas enters the valve body 1 through the input end and exits through its output end. During this process, the gas is filtered by the filter screen 10 to prevent dust and other impurities from adhering between the valve cover 2 and the inside of the valve body 1, which would cause a gap in the sealed valve after it is closed. After being filtered by the filter screen 10, the air drives the impeller 16 to rotate, which in turn drives the shaft 15 to rotate. The shaft 15 drives the gear A17 to rotate, the gear A17 drives the gear B18 to rotate, and the gear B18 drives the internal gear ring 19 and the filter screen 10 to rotate. At this time, the rotation speed of the filter screen 10 is reduced after several decelerations to avoid damage from excessively high-speed rotational friction. The rotating filter screen 10 slides against the L-shaped scraper 11, and impurities on its surface are scraped off and fall into the drain pipe 4. At the same time, the impeller 16 rotates and drives the drive shaft 20 and turbine 21 to rotate at high speed through the shaft 15, helical gear 22 and helical gear disk 23. Part of the air filtered by the filter screen 10 enters the conical air chamber 131 along the air inlet 132. After entering the conical air chamber 131, the gas is compressed and enters the blowing hood 12 from the air outlet 14. High-pressure gas blows air from the side of the filter screen 10 away from the L-shaped scraper 11 to clear the filter screen holes and prevent them from getting clogged.

[0029] Example 2

[0030] like Figures 1-3 As shown, the present invention proposes a manual double-link sealing valve. Compared with the first embodiment, the drain pipe 4 is provided with a locking knob 7 that is spirally connected to it. One end of the locking knob 7 inserted into the drain pipe 4 abuts against the outer surface of the cylinder 5.

[0031] In this embodiment, by locking the cylinder 5 with the locking knob 7, the cylinder 5 can be effectively prevented from rotating freely, thereby avoiding the high-pressure airflow from driving the cylinder 5 to rotate, so that the harmful gas flowing in the valve body can be intermittently discharged from the drain pipe 4 without manual operation.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A manually operated double-link sealing valve, characterized in that, include: Valve body (1), valve cover (2) and drive assembly (3) for driving valve cover (2) to flip are provided on valve body (1), sewage pipe (4) connected to the inside of valve body (1) is provided at the input end of valve body (1), and a sub-control valve is provided on sewage pipe (4); A feed pipe (8) is coaxially arranged at the input end of the inner cavity of the valve body (1). A through hole B (81) connected to the drain pipe (4) is provided on the feed pipe (8). A central column (9) is coaxially arranged on the inner side of the feed pipe (8). A filter screen (10) is coaxially rotatably arranged on the central column (9). The outer edge of the filter screen (10) slides in contact with the inner arc surface of the feed pipe (8). An L-shaped scraper (11) is provided on the inner wall of the feed pipe (8) near the through hole B (81). The L-shaped scraper (11) slides in contact with the side of the filter screen (10) near the input end of the valve body (1). Air blowing hood (12) is set inside the feed tube (8). The air blowing hood (12) and the L-shaped scraper (11) are symmetrical about the filter screen (10). Air pipe (13) is installed on the central column (9). The input end of the air pipe (13) is connected to the output end of the valve body (1). The output end of the air pipe (13) is connected to the input end of the air blowing hood (12). An air compression assembly is installed inside the air pipe (13). A rotating shaft (15) is coaxially connected to the central column (9). An impeller (16) is provided on the side of the rotating shaft (15) near the output end of the valve body (1). The transmission mechanism connects the rotating shaft (15), the filter screen (10), and the air compressor assembly to drive the filter screen (10) to rotate while the rotating shaft (15) is rotating, and to drive the air compressor assembly to work.

2. The manual double-link sealing valve according to claim 1, characterized in that, A through hole A (101) is provided on the valve body (1). The through hole A (101) is attached to and connected with the through hole B (81). The input end of the drain pipe (4) is covered by the outside of the through hole A (101).

3. A manually operated double-link sealing valve according to claim 1, characterized in that, The control valve includes a cylinder (5) and a crank (6). The cylinder (5) is installed inside the drain pipe (4) and is rotatably connected to it. A receiving groove (501) is provided on the arc surface of the cylinder (5). The opening size of the receiving groove (501) is not less than the channel cross-sectional size of the drain pipe (4). When the cylinder (5) is rotating, the drain pipe (4) is never connected to the outside. A crank (6) is rotatably installed on the drain pipe (4) to drive the cylinder (5) to rotate.

4. A manually operated double-link sealing valve according to claim 3, characterized in that, A locking knob (7) is provided on the drain pipe (4) and is spirally connected to it. One end of the locking knob (7) inserted into the drain pipe (4) abuts against the outer surface of the cylinder (5).

5. A manually operated double-link sealing valve according to claim 1, characterized in that, The air compressor assembly includes a turbine (21), a conical air chamber (131) is provided inside the air duct (13), an air inlet (132) is provided at the input end of the air duct (13), an air outlet (14) is provided at the output end of the air duct (13), the output end of the air outlet (14) is connected to the inside of the air blowing hood (12), a drive shaft (20) coaxial with the conical air chamber (131) is provided inside the air duct (13), the turbine (21) is coaxially connected with the drive shaft (20), and the turbine (21) is a conical turbine.

6. A manually operated double-link sealing valve according to claim 5, characterized in that, The transmission mechanism includes transmission component A and transmission component B. Transmission component A includes a helical gear (22) and a helical gear disk (23). The helical gear (22) is coaxially connected to the transmission shaft (20), and the helical gear disk (23) is coaxially connected to the rotating shaft (15). The helical gear (22) meshes with the helical gear disk (23).

7. A manually operated double-link sealing valve according to claim 6, characterized in that, The transmission assembly B includes gear A (17), gear B (18) and internal gear ring (19). Gear A (17) is coaxially connected to the rotating shaft (15). Gear B (18) is rotatably connected to the central column (9) and meshes with gear A (17). The internal gear ring (19) is coaxially rotatably mounted on the central column (9). Gear A (17) and gear B (18) are both located inside the internal gear ring (19), and gear B (18) meshes with the internal gear ring (19).

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